---
id: CVE-2026-62722
title: Microsoft Brokering File System Elevation of Privilege Vulnerability
summary: >-
  Heap-based buffer overflow in Windows Brokering File System allows an
  authorized attacker to elevate privileges locally.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-122
vendor: Microsoft
product: Windows 11 Version 24H2
affected:
  - windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168
  - windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168
  - windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704
  - windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296
  - >-
    windows_server_2025_server_core_installation >= 10.0.26100.0 <
    10.0.26100.33296
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-12T03:59:09.166108Z'
published: '2026-08-11'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T19:36:03.545Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-62722'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62722'
    label: Microsoft Brokering File System Elevation of Privilege Vulnerability
tags:
  - cve.org
epss: 0.00333
epssPercentile: 0.23894
ingestedAt: '2026-09-08T18:07:34.899Z'
---

## Overview

Heap-based buffer overflow in Windows Brokering File System allows an authorized attacker to elevate privileges locally.

## Affected

- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.9168`
- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.9168`
- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2704`
- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33296`
- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33296`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.